Mamafa-tiute mafolafola mafolafola tipi fa'atuputeleina le soifua tautua o le 20% pe a faatusatusa i le tipi vili masani.
E mafai ona fa'aogaina lenei ituaiga o fa'ameamea mo le fa'agaioiina: u'amea u'amea, carbon sila, SDK fa'asologa u'amea sila, abrasive sila ma isi.